Ullah, M. B.; Karim, M. R.; Alam, M. S.; Hassan, M. R.; Bhuiyan, M. A.; Rana, M. S. Formulation and In Vitro Evaluation of Unfolding Type Expandable Gastroretentive Film of Enalapril Maleate. Bangla Pharma J 2018, 20, 148-156.